The Premier League side are reportedly keen on strengthening their defence in January and boss Rafa Benitez has set his sights on Jetro Willems.

The 24-year-old joined the German side from PSV Eindhoven last year but has failed to hold down a starting spot at the club. A bid of €4.5 million is said to be enough to prise the defender away from Frankfurt.

However, Newcastle United are not the only club interested in the Dutch international, with Roma also said to be tracking Willems.